81362200033 has 4 divisors (see below), whose sum is σ = 83093310720. Its totient is φ = 79631089348.

The previous prime is 81362200027. The next prime is 81362200061. The reversal of 81362200033 is 33000226318.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33000226318 = 2 ⋅16500113159.

It is a cyclic number.

It is not a de Polignac number, because 81362200033 - 2⁹ = 81362199521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 81362199974 and 81362200010.

It is not an unprimeable number, because it can be changed into a prime (81362200063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865555273 + ... + 865555366.

It is an arithmetic number, because the mean of its divisors is an integer number (20773327680).

Almost surely, 2^81362200033 is an apocalyptic number.

It is an amenable number.

81362200033 is a deficient number, since it is larger than the sum of its proper divisors (1731110687).

81362200033 is a wasteful number, since it uses less digits than its factorization.

81362200033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1731110686.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 81362200033 in words is "eighty-one billion, three hundred sixty-two million, two hundred thousand, thirty-three".